<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Document</title>
</head>
<body>
<form action="http://localhost:8000/login/form" method="post" enctype="application/x-www-form-urlencoded">
  用户名<input type="text" name="username"><br>
  密码<input type="password" name="password">
  <input type="submit" value="提交">
</form>
</body>
</html>